Even though I am at lot into metal I can't play Factorio while listening to it. Somehow destroys the mood... probably the usual pace of most metal genre's is just too fast for the long, drawn out gameplay of Factorio. Maybe some atmospheric black/doom metal with 10 minute long songs are okay, but everything else... brrr... Can't deal with it... Would be better to play Doom 4 itself then but then again that already has an awesome djent soundtrack.

Generally cant play with anything in the background, because i use to crank everything up.

What I somehow still can listen to while playing is Dave Matthews Band, sounds good at any volume and imho fits any game as a background. Was played with Factorio and Far Cry 5 recently
Sometimes, but VERY rarely, i also listen to orchestra movie scores, like Hans Zimmer

But shameless self-promotion aside... Factorio is more than a game; Factorio is a feeling. Factorio is a sanctuary. Factorio is a release. Factorio will pick you up when you feel down. Factorio will make you strong when you feel weak. Factorio will fill you up, when you feel hungry.